The MAPI subsystem has experienced a network failure. Verify that you are accessing the correct Exchange server, and that the Exchange server has the Client Access Role installed. Also check that the /CLIENTACCESSSERVER parameter is correct.
Data Protection for Exchange tried to connect to Exchange, but experienced a network failure.
Processing stops.
Verify that you are accessing the correct Exchange server, and that the Exchange server has the Client Access Role installed. Also check that the /CLIENTACCESSSERVER parameter is correct.